package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.awt.datatransfer.FlavorEvent;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    // 新增菜品
    @Transactional
    @Override
    public void saveWithFlavor(@RequestBody DishDTO dishDTO){
        //1.保存菜品信息
        //1.1 dishDTO -> dish
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //1.2 调用mapper完成新增
        dishMapper.insert(dish);
        //1.3 拿到回写的id
        Long dishId = dish.getId();
        //2.保存菜品的口味信息
        //2.1 判断当前传入的信息中是否有菜品口味的信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            //给口味信息赋值
            flavors.forEach(dishFlavor ->
            {
                dishFlavor.setDishId(dishId);
            });
            //写入到数据库中
            dishFlavorMapper.saveBatch(flavors);
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除
     * @param ids
     */
    @Transactional
    @Override
    public void delete(List<Long> ids) {
        //查询传入的菜品中是否有起售状态的菜品
        Integer enableCount =  dishMapper.getCountByIdsAndStatus(ids);
        if(enableCount>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
        //查询当前菜品是否属于某个套餐
        Integer countByDishIds = setmealDishMapper.getCountByDishIds(ids);
        if(countByDishIds > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
        //批量删除菜品
        dishMapper.deleteById(ids);
        //批量删除菜品口味
        dishFlavorMapper.deleteByDishid(ids);
        //
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到vo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 根据id修改菜品和菜品的口味信息
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表基本信息
        dishMapper.update(dish);
        //删除原有的口味数据
        List<Long> dishId = Arrays.asList(dishDTO.getId());
        dishFlavorMapper.deleteByDishid(dishId);
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            //给口味信息赋值
            flavors.forEach(dishFlavor ->
            {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表中插入n条数据
            dishFlavorMapper.saveBatch(flavors);
    }
}

    /**
     * 通过id修改菜品的起售状态
     * @param id
     * @param status
     */
    @Override
    public void updateWithStatus(Integer status, Long id) {
        Dish dish = new Dish();
        dish.setStatus(status);
        dish.setId(id);
        //更新人和更新时间
        dish.setUpdateTime(LocalDateTime.now());
        dish.setUpdateUser(BaseContext.getCurrentId());
        dishMapper.updateStatus(dish);
    }

    /**
     * 根据id查询菜品
     */
    @Override
    public List<Dish> List(Long categoryId) {
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
